Carrier route record
OHGSP→ORD
PSA Airlines · Greer to Chicago
- Flights
- 127
- Period
- July 2025 to June 2026
- Share of route
- 7%
- Carriers
- 6
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with PSA Airlines.
PSA on GSP to ORD lands a B, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 127 flights. The strongest carrier on the route with a full sample, Envoy Air, flew 775 at 72.5% on time.
Set against the rest of the country, PSA's GSP to ORD record is 5 points better than the US average of 77.6%. That gap is worth roughly 53 fewer late arrivals for every thousand flights.
Key figures
On time
82.9%
Arrivals under 15 minutes late, of 123 completed flights
Avg delay
64 min
Across delayed arrivals only, not all flights
Cancelled
2.36%
National rate is 1.81%
Whole route
74.9%
Every carrier on GSP to ORD, 1,797 flights
These figures cover 127 flights between July 2025 and June 2026. The median arrival is 12 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Carrier by carrier
PSA against every carrier on GSP to ORD
PSA flew 127 of the 1,797 flights on GSP to ORD, about 7% of it. Its 82.9% on time is 8 points better than the route as a whole, which runs 74.9%. Ranked by on-time rate it is number three of six carriers on the route, where the range runs from United at 100.0% to SkyWest at 70.4%. Three of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The two carriers here are closely matched: 2 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlinesthin sample | 1 | 100.0% | — | 0.00% | A+ |
| Republic Airwaysthin sample | 313 | 84.5% | 79 min | 2.88% | B |
| PSA Airlines (this page)thin sample | 127 | 82.9% | 64 min | 2.36% | B |
| American Airlinesthin sample | 54 | 77.6% | 56 min | 9.26% | B− |
| Envoy Air | 775 | 72.5% | 66 min | 3.48% | C− |
| SkyWest Airlines | 527 | 70.4% | 83 min | 4.74% | C− |
SkyWest Airlines cancels 4.7% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Departure window
When PSA runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 19 points, against 2 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am88 flights88.2%
- 8am–11am37 flights69.4%
- 11am–2pm—
- 2pm–5pm—
- 5pm–8pm—
- 8pm–5am2 flights—
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 88.2% of the time, against 69.4% for the morning window. That is 19 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 88 flights scheduled in it.
Across the year
PSA on GSP to ORD through the year
- Jul–Sep 202592 flights80.9%
- Oct–Dec 202534 flights87.9%
- Jan–Mar 20261 flights—
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 82.9% on time across 127 flights.
Split by quarter, PSA on GSP to ORD logged 92 flights in Jul–Sep 2025, 34 flights in Oct–Dec 2025 and 1 flights in Jan–Mar 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 82.9% annual figure is the one to use.
Delay causes
Why PSA runs late on this route
One category carries most of the weight here. Carrier accounts for 79% of the 1,338 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 79%Carrier
- 19%National Airspace System
- 2%Security
The largest share of delay minutes, 79%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,051 of the 1,338 delay minutes reported here. The split is drawn from 1,338 reported delay minutes.
Cancellations sit at 2.36% against a national 1.81%, which is ordinary. Diversions add another 0.79%.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 4.9% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 577 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 48.7% on time across 126 flights, 34 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 34 points of difference.
One caution: this is a thin sample. 127 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking PSA on GSP to ORD
Put together: treat all of this as provisional. 127 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 82.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 123 completed flights over 12 months sit behind that.
Related
Where to go next
- GSP to ORD, every carrier
- PSA on ORD to GSP, the return leg
- Republic Airways on GSP to ORD84.5%
- Envoy Air on GSP to ORD72.5%
- SkyWest Airlines on GSP to ORD70.4%
- PSA Airlines network-wide record
- Chicago O'Hare International (ORD) delay statistics
- The best time of day to fly, according to 7.04 million flight records
- How to read this site: grades, sample sizes, and honest caveats
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.